出版日期：2025-12-16 00:00:00

著者：Kuen-Chan Lee; Jen-Hsien Huang; Chih-Jen Liu; Yin-Cheng Yen; Wei Kong Pang; Huei Chu Weng; Shih-Chieh Hsu; Zong-Liang Tseng

著錄名稱、卷期、頁數：Applied Surface Science 723, 165592

摘要：In this study, we demonstrate the enhanced electrochemical performance of LTO achieved through encapsulation with a composite layer of multi-walled carbon nanotubes (MWCNTs) and SiO2. The SiO2 coating serves as an inert buffer layer that passivates the catalytic sites on the LTO surface, thereby mitigating undesirable side reactions at the LTO–electrolyte interface. In addition, the incorporation of MWCNTs enhances the electrical conductivity, resulting in reduced electrochemical polarization and improved kinetics. The modified LTO electrode delivers an improved rate and cycling performance compared to the pristine one. Furthermore, LiNi0.6Mn0.2Co0.2O2 (NMC)//LTO soft-packed cells were fabricated to investigate gassing behavior, and lithium-ion hybrid capacitors (LiHCs) incorporating the modified LTO and active carbon (AC) were assembled to evaluate their practical applicability. These results indicate that surface modification of LTO with a MWCNT/SiO2 composite layer effectively mitigates gas generation, thereby enhancing cycling stability. Relative to the capacity measured at 0.1C, the modified LTO-based LIB full cell sustains 78.2 % of its capacity at a high current density of 6C and retains 80.0 % of its initial capacity after 500 charge–discharge cycles, underscoring its superior rate capability and long-term cycling stability. Moreover, the LiHC device assembled with the modified LTO electrode delivers a high energy density of 54 Wh/kg at a power density of 200 W/kg, along with outstanding cycling stability, maintaining 81.4 % of its initial capacitance after 10 000 cycles.

關鍵字：Li4Ti5O12; SiO2; MWCNT; Surface modification; Gassing

語言：en

ISSN：0169-4332; 1873-5584

期刊性質：國外

收錄於：SCI

審稿制度：否

國別：NLD

出版型式：電子版,紙本